SPONTANEOUS ADSORPTION OF HETEROPOLYTUNGSTATES AND HETEROPOLYMOLYBDATES ON THE SURFACES OF SOLID ELECTRODES AND THE ELECTROCATALYTIC ACTIVITY OF THE ADSORBED ANIONS
Cy. Rong et Fc. Anson, SPONTANEOUS ADSORPTION OF HETEROPOLYTUNGSTATES AND HETEROPOLYMOLYBDATES ON THE SURFACES OF SOLID ELECTRODES AND THE ELECTROCATALYTIC ACTIVITY OF THE ADSORBED ANIONS, Inorganica Chimica Acta, 242(1-2), 1996, pp. 11-16
Heteropolytungstate and heteropolymolybdate anions spontaneously adsor
b from aqueous solutions onto mercury, gold, pyrolytic graphite and gl
assy carbon electrodes. The adsorption persists when the electrodes ar
e transferred to pure supporting electrolyte solutions where the elect
rochemical responses from the adsorbed anions can be observed. The ads
orption is much less extensive from non-aqueous solvents. The adsorbed
anions can serve as catalysts for various electrode reactions. Exampl
es are given of the electrocatalytic reductions of hydrogen peroxide t
o water and of nitrite to ammonia.